Convert //extensions/renderer from scoped_ptr to std::unique_ptr

extensions/renderer/user_script_injector.cc

Index: extensions/renderer/user_script_injector.cc
diff --git a/extensions/renderer/user_script_injector.cc b/extensions/renderer/user_script_injector.cc
index b1218d50ed4530608ecbd810ceff510e0bbdaaee..71b41eb2e1d95b47c4b4b5538455d121a0363fc6 100644
--- a/extensions/renderer/user_script_injector.cc
+++ b/extensions/renderer/user_script_injector.cc
@@ -252,10 +252,9 @@ void UserScriptInjector::GetRunInfo(
 }
 
 void UserScriptInjector::OnInjectionComplete(
-    scoped_ptr<base::Value> execution_result,
+    std::unique_ptr<base::Value> execution_result,
     UserScript::RunLocation run_location,
-    content::RenderFrame* render_frame) {
-}
+    content::RenderFrame* render_frame) {}
 
 void UserScriptInjector::OnWillNotInject(InjectFailureReason reason,
                                          content::RenderFrame* render_frame) {